Yeah, you have to shift your mind a little and think in terms of the flow of money. Income is money flowing from "the world" to your assets. In order for your a

Yeah, you have to shift your mind a little and think in terms of the flow of money. Income is money flowing from "the world" to your assets. In order for your assets to be positive, the income must be negative. Expense is the exact opposite; it's money leaving your assets to go to "the world". Basically, think of the left side of your equation (expenses + income) as "not yours".